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Richland County
Richland County
County
	Richland County Courthouse in Sidney
	Location within the U.S. state of Montana
	Montana's location within the U.S.
	Coordinates: 47°47′N 104°34′W / 47.79°N 104.56°W
Country	United States
State	Montana
Founded	May 27, 1914
Seat	Sidney
Largest city	Sidney
Area
• Total	2,103 sq mi (5,450 km2)
• Land	2,084 sq mi (5,400 km2)
• Water	19 sq mi (50 km2) 0.9%
Population (2020)
• Total	11,491
• Estimate (2022)	11,237
• Density	5.5/sq mi (2.1/km2)
Time zone	UTC−7 (Mountain)
• Summer (DST)	UTC−6 (MDT)
Congressional district	2nd
Website	www.richland.org
	Montana county number 27;

Richland County is a county in the U.S. state of Montana. As of the 2020 census, the population was 11,491.^[2] Its county seat is Sidney.^[3]

Richland County was created by the Montana Legislature in 1914 from part of Dawson County. An early proposed name for the county was Gate, but Richland was decided upon instead as a way to entice new settlers.^[4]

Geography

According to the United States Census Bureau, the county has a total area of 2,103 square miles (5,450 km²), of which 2,084 square miles (5,400 km²) is land and 19 square miles (49 km²) (0.9%) is water.^[5]

Major highways

Adjacent counties

Roosevelt County – north
Williams County, North Dakota – northeast
McKenzie County, North Dakota – east
Wibaux County - south
Dawson County – southwest
McCone County - west

Demographics

Historical population
Census	Pop.	Note	%±
1920	8,989		—
1930	9,633		7.2%
1940	10,209		6.0%
1950	10,366		1.5%
1960	10,504		1.3%
1970	9,837		−6.3%
1980	12,243		24.5%
1990	10,716		−12.5%
2000	9,667		−9.8%
2010	9,746		0.8%
2020	11,491		17.9%
2022 (est.)	11,237	^[6]	−2.2%
U.S. Decennial Census^[7] 1790–1960,^[8] 1900–1990,^[9] 1990–2000,^[10] 2010–2020^[2]

2020 census

As of the 2020 census, there were 11,491 people living in the county.^{[citation needed]}

2010 census

As of the 2010 census, there were 9,746 people, 4,167 households, and 2,698 families in the county. The population density was 4.7 inhabitants per square mile (1.8/km²). There were 4,550 housing units at an average density of 2.2 per square mile (0.85/km²). The racial makeup of the county was 95.0% white, 1.7% American Indian, 0.2% Asian, 0.1% black or African American, 0.8% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 3.0% of the population. In terms of ancestry, 37.8% were German, 23.1% were Norwegian, 13.0% were Irish, 8.7% were American, and 6.5% were English.

Of the 4,167 households, 28.9% had children under the age of 18 living with them, 51.9% were married couples living together, 7.6% had a female householder with no husband present, 35.3% were non-families, and 29.8% of all households were made up of individuals. The average household size was 2.33 and the average family size was 2.88. The median age was 41.3 years.

The median income for a household in the county was $52,516 and the median income for a family was $60,236. Males had a median income of $44,788 versus $23,135 for females. The per capita income for the county was $26,888. About 10.2% of families and 13.5% of the population were below the poverty line, including 16.6% of those under age 18 and 14.4% of those age 65 or over.

Economy

Although most of the surface land of the county is devoted to ranching, oil exploration and production became important elements of the county's economy beginning with the discovery in 2000 of Elm Coulee Oil Field, part of the Bakken formation.^[11]

Politics

Richland County voters have been reliably Republican, opting only one time for the Democratic Party candidate in national elections since 1948 (as of 2020).

United States presidential election results for Richland County, Montana^[12]
Year	Republican		Democratic		Third party(ies)
Year	No.	%	No.	%	No.	%
2024	4,387	82.63%	778	14.65%	144	2.71%
2020	4,800	82.79%	875	15.09%	123	2.12%
2016	3,908	80.23%	671	13.78%	292	5.99%
2012	3,510	75.52%	1,002	21.56%	136	2.93%
2008	3,184	70.50%	1,203	26.64%	129	2.86%
2004	3,110	72.19%	1,120	26.00%	78	1.81%
2000	2,858	70.87%	1,018	25.24%	157	3.89%
1996	2,021	44.24%	1,614	35.33%	933	20.42%
1992	1,760	37.07%	1,440	30.33%	1,548	32.60%
1988	2,628	57.81%	1,824	40.12%	94	2.07%
1984	3,847	72.85%	1,382	26.17%	52	0.98%
1980	3,348	66.45%	1,252	24.85%	438	8.69%
1976	2,189	51.35%	1,961	46.00%	113	2.65%
1972	2,645	61.51%	1,438	33.44%	217	5.05%
1968	2,381	59.29%	1,399	34.84%	236	5.88%
1964	1,784	43.19%	2,320	56.16%	27	0.65%
1960	2,395	56.10%	1,863	43.64%	11	0.26%
1956	2,366	55.67%	1,884	44.33%	0	0.00%
1952	2,506	67.28%	1,196	32.11%	23	0.62%
1948	1,332	43.11%	1,673	54.14%	85	2.75%
1944	1,347	42.61%	1,777	56.22%	37	1.17%
1940	1,497	41.07%	2,095	57.48%	53	1.45%
1936	1,066	28.99%	2,516	68.43%	95	2.58%
1932	1,216	39.02%	1,768	56.74%	132	4.24%
1928	1,648	63.53%	917	35.35%	29	1.12%
1924	926	49.95%	238	12.84%	690	37.22%
1920	1,759	65.46%	744	27.69%	184	6.85%
1916	1,223	36.51%	1,947	58.12%	180	5.37%